This error appears when you have updated the ADML and ADMX file to Windwos 10, version 1803. Let’s see how to fix it!

When trying to editing a policy, you receive this error: Resource ‘$(string id=Win7Only)’ referenced in attribute displayName could not be found.

This is a known issue for Microsoft, in fact there was an update in the Windows 10 version 1803’s SearchOCR.ADML file and this line was missed in the new ADML file:

<string id=”Win7Only”>Microsoft Windows 7 or later</string>

The way I used to fix this was to manually editing SearchOCR.ADML.

Editing SearchOCR.ADML

• Make a copy of \Policies\PolicyDefinitions\en-us\searchocr.adml. Normally this path is under \\yourdomain\sysvol\yourdomain. This is needed in case the file you’ll edit gets corrupted.
• With a text editor, open \Policies\PolicyDefinitions\en-us\searchocr.adml and search for <string id=”OCREveryPage”>Force TIFF IFilter to perform OCR for every page in a TIFF document</string>.
  • The line above this, should be: <string id=”OCR”>OCR</string>
  • 
• Add the following string, right after <string id=”OCR”>OCR</string>:
  • <string id=”Win7Only”>Microsoft Windows 7 or later</string>
  • 
• Save the file and try again (allow some time for replication if you have multiple Domain Controllers).

EDIT: There’s a KB from MS finally released for this HERE.